'Mr. Robot' Star Portia Doubleday -- That One Time I Was 'Ransomed' (VIDEO)

Portia Doubleday had a bounty on her head ... in a plot worthy of a Shonda Rhimes show.  We caught up with the "Mr. Robot" star Monday in L.A. where she told our photog about a crazy kidnapping scam where hackers scared the crap out of her…